Use a different Python interpreter

Question

I am trying to run Blender 2.80 with another install of Python 3.7 (the one coming with SageMath located on my computer in /opt/sage/local/bin/python3.7)

I followed the instruction of the page "Tips and tricks", i.e.

Removed the Blender Python sub-directory
Run Blender, with the appropriate PYTHONPATH

Blender runs correctly. However when I print "sys.executable" I get

/Applications/blender/blender.app/Contents/MacOS/blender

where I expected

/opt/sage/local/bin/python3.7

As a consequence the property "sys.prefix" is

/Users/brecht/dev/build_darwin/deps/Release/python

instead of

/opt/sage/local

It follows that I cannnot use some of the modules installed with SageMath, as they use external files whose locations is given starting from sys.prefix.

Is it the normal behavior, when removing the the Blender Python sub-directory ? If so is there a way to set up "sys.prefix" differently ?

Thank you very much for the help !!

One of the developers of Blender is called Brecht, maybe an example of his got hardcoded somewhere? Possibly user @brecht on this forum is the same person and can comment? — Samuel Lelièvre, Jun 09 '19 at 18:28
Some Blender documentation pages mention a way to build Blender as a Python module. The corresponding wiki page is now gone, but is preserved in the Blender wiki archive and on the web archive's internet wayback machine. Maybe worth a try? — Samuel Lelièvre, Jun 09 '19 at 20:56
Some people documented how they managed to build Blender as a Python module in Blender Stack Exchange question 126959 and Blender Stack Exchange question 117200. I would try that, using SageMath's Python3 as the base Python installation. — Samuel Lelièvre, Jun 10 '19 at 16:59

Use a different Python interpreter

0 Answers0